CN102196111A - Short-wave two-path modulator-demodulator - Google Patents
Short-wave two-path modulator-demodulator Download PDFInfo
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- CN102196111A CN102196111A CN2011100931885A CN201110093188A CN102196111A CN 102196111 A CN102196111 A CN 102196111A CN 2011100931885 A CN2011100931885 A CN 2011100931885A CN 201110093188 A CN201110093188 A CN 201110093188A CN 102196111 A CN102196111 A CN 102196111A
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Abstract
The invention discloses a short-wave two-path modulator-demodulator, which comprises two paths of modulators and two paths of demodulators, wherein in the two paths of modulators, one path of modulator comprises a convolution code unit, a first waveform generating unit, a first phase shift keying (PSK) modulation unit and a first waveform shaping unit, which are connected in sequence; the other path of modulator comprises a data modulation unit, a second waveform generating unit, a second PSK modulation unit and a second waveform shaping unit, which are connected in sequence; in the two paths of demodulators, one path of demodulator comprises a low-pass filter unit, a first interference suppression unit, a first time domain equalization unit, a first PSK demodulation unit and a first convolution decoding unit, which are connected in sequence; and the other path of demodulator comprises a band-pass filter unit, a second interference suppression unit, a second time domain equalization unit, a second PSK demodulation unit and a second convolution decoding unit, which are connected in sequence. According to the short-wave two-path modulator-demodulator, the rate is improved, namely under the condition of certain channel quality, the communication data transmission rate is doubled. The short wave two-path modulator-demodulator has the advantages of improved performance, good compatibility, multiple functions and wide application scope.
Description
Technical field
The present invention relates to wireless data communication technology, be mainly used in shortwave digital communication radio station, relate in particular to a kind of shortwave two-way modulator-demodulator.
Background technology
Transfer of data is mainly carried out in existing military, civilian shortwave digital communication radio station in audio bandwidth.On transmission rate and transmission quality,, more and more demands of applications can not be satisfied, the transmission demand of mass data such as image, video transmission can not be satisfied especially owing to be subjected to the restriction of 3k audio bandwidth.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of shortwave two-way modulator-demodulator at the deficiencies in the prior art.Adopt following technical scheme:
A kind of shortwave two-way modulator-demodulator adopts the two-way parallel channel to carry out transfer of data.
Described shortwave two-way modulator-demodulator, described two-way parallel channel comprises two-way modulator and two-way demodulator, in the described two-way modulator, the one tunnel comprises convolution code unit, first wave generating unit, a PSK modulating unit and the first waveform shaping unit that connects in turn; Another road comprises data-modulated unit, second wave generating unit, the 2nd PSK modulating unit and the second waveform shaping unit that connects in turn; In the described two-way demodulator, the one tunnel comprises that the low-pass filter unit, first that connects in turn disturbs inhibition unit, the first time domain equalization unit, a PSK demodulating unit, the first convolution decoding unit; Another road comprises that the bandpass filtering unit, second that connects in turn disturbs inhibition unit, the second time domain equalization unit, the 2nd PSK demodulating unit, the second folding coding unit.
The present invention mainly contains following beneficial effect:
Speed improves: under the certain situation of channel quality, the message transmission rate of communicating by letter is doubled.
Performance improves: under the same situation of message transmission rate, the interference free performance of transfer of data is doubled.
Compatible: each channel adopts the transfer of data system in active service radio station, can realize intercommunication with the transfer of data in active service radio station.
Diverse in function: two channels carry out independent modulation to data respectively, the transmittability of two channels comprehensively can be used, and also can use respectively two channels, such as realizing simultaneous data and speech transmission.
Be widely used: can be suitable for various domestic and international short-wave radio sets.
Promote performance:, can improve the performance of two-way modulator-demodulator exponentially by improving the communication performance of single channel.
Description of drawings
Fig. 1 is transmitting terminal transmission flow figure of the present invention;
Fig. 2 receives flow process for receiving terminal of the present invention;
Fig. 3 is an XD-D12V short-wave radio set illustraton of model of the present invention.
Embodiment
Below in conjunction with specific embodiment, the present invention is described in detail.
Embodiment 1
The two-way modulator-demodulator adopts the two-way parallel channel to carry out transfer of data.
Total channel width is 7kHz, is divided into 2 adjacent 3kHz channels, and two interchannels keep the protection interval of 600Hz.
Each channel width 3kHz adopts " 15 " serial short-wave radio set transfer of data system.Transmit 75,150,300,600,1200 and the 2400bps data respectively, total speed reaches 150,300,600,1200,2400 and 4800bps.
According to sampling thheorem, the baseband sampling rate of two-way modulator-demodulator is 19.2kbps, and its nyquist frequency is 9.6kbps.
Baseband waveform adopts the square root raised cosine forming filter to carry out waveform shaping.
Realize separating of baseband signal by low pass filter with band pass filter.The passband of low pass filter is 0Hz～3300Hz, and the passband of band pass filter is 3900Hz～6900Hz.
The data allocations that adopting data to split agreement will need to send is carried out modulation system respectively to two channels.After two channel demodulations of recipient go out data, press the data fusion agreement with reduction of data.
Embodiment 2
Shortwave two-way modulator-demodulator comprises two-way modulator and two-way demodulator; In the described two-way modulator, the one tunnel comprises convolution code unit, first wave generating unit, a PSK modulating unit and the first waveform shaping unit that connects in turn; Another road comprises data-modulated unit, second wave generating unit, the 2nd PSK modulating unit and the second waveform shaping unit that connects in turn; In the described two-way demodulator, the one tunnel comprises that the low-pass filter unit, first that connects in turn disturbs inhibition unit, the first time domain equalization unit, a PSK demodulating unit, the first convolution decoding unit; Another road comprises that the bandpass filtering unit, second that connects in turn disturbs inhibition unit, the second time domain equalization unit, the 2nd PSK demodulating unit, the second folding coding unit.
At transmitting terminal, as shown in Figure 1, data to be sent split agreement through splitting at the data split cells according to data, form two paths of data, entering the two-way modulator respectively modulates: data are carried out code interleaving by the convolutional encoding unit, and the coded-bit of output is in separately channel.Transmission course is as follows: synchronous head at first produces synchronous code through first wave generating unit, second wave generating unit; Coded-bit enters first wave generating unit, second wave generating unit, after in first wave generating unit, second wave generating unit, carrying out scrambler and inserting frequency pilot sign, output to a PSK modulating unit, the 2nd PSK modulating unit unification and carry out the PSK modulation, after the PSK modulation, move on the carrier frequency corresponding, in the first waveform shaping unit, the second waveform shaping unit carries out waveform shaping respectively.The laggard up-conversion of two-way baseband signal aliasing unit after the shaping carries out up-conversion, enters radio frequency unit afterwards and sends.
At receiving terminal, as shown in Figure 2, intermediate frequency data enters the two-way demodulator respectively through the baseband signal that produces after the down-converter unit and carries out demodulation process: after the low pass filter in process 3k broadband and band pass filter carry out filtering, remove this road carrier wave again, respectively after the first interference inhibition unit, second disturbs the inhibition unit to finish the interference inhibition, carry out signal identification and synchronous again, carry out following operation at data phase, at first enter the first time domain equalization unit, the second time domain equalization unit carries out time domain equalization; Enter a PSK demodulating unit then, the 2nd PSK demodulating unit carries out the PSK demodulation; Then enter the first convolution decoding unit, the second folding coding unit carries out folding coding, at last the order of the data of demodulation being come out by the reduction of data agreement in the data integral unit is adjusted.
As shown in Figure 3, be that two-way modulator-demodulator of the present invention obtains practicing schematic diagram on short-wave radio set XD-D12V, according to the channel requirement of XD-D12V short-wave radio set, the intermediate frequency carrier of two-way modulator-demodulator is 20KHz, sampling rate 614.4Kbps.Down-conversion DDC produces baseband signal to intermediate-freuqncy signal after mixing, extraction, corresponding numeric code rate becomes 19.2Kbps from 614.4Kbps, and total extraction yield is 32.Up-conversion DUC up-converts to intermediate-freuqncy signal with the baseband signal of 19.2Kbps through interpolation, mixing, and corresponding numeric code rate becomes 614.4Kbps from 19.2Kbps, 32 times of interpolation.
The XD-D12V short-wave radio set is after using the two-way modulator-demodulator, and message transmission rate realizes 150,300,600,1200,2400 and 4800bps.
Should be understood that, for those of ordinary skills, can be improved according to the above description or conversion, and all these improvement and conversion all should belong to the protection range of claims of the present invention.
Claims (2)
1. a shortwave two-way modulator-demodulator is characterized in that, adopts the two-way parallel channel to carry out transfer of data.
2. shortwave two-way modulator-demodulator according to claim 1, it is characterized in that, described two-way parallel channel comprises two-way modulator and two-way demodulator, in the described two-way modulator, the one tunnel comprises convolution code unit, first wave generating unit, a PSK modulating unit and the first waveform shaping unit that connects in turn; Another road comprises data-modulated unit, second wave generating unit, the 2nd PSK modulating unit and the second waveform shaping unit that connects in turn; In the described two-way demodulator, the one tunnel comprises that the low-pass filter unit, first that connects in turn disturbs inhibition unit, the first time domain equalization unit, a PSK demodulating unit, the first convolution decoding unit; Another road comprises that the bandpass filtering unit, second that connects in turn disturbs inhibition unit, the second time domain equalization unit, the 2nd PSK demodulating unit, the second folding coding unit.
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| CN201110093188.5A CN102196111B (en) | 2011-04-14 | 2011-04-14 | Short-wave two-path modulator-demodulator |
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| CN201110093188.5A CN102196111B (en) | 2011-04-14 | 2011-04-14 | Short-wave two-path modulator-demodulator |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105471801A (en) * | 2015-12-02 | 2016-04-06 | 中国电子科技集团公司第四十一研究所 | 5G mobile communication digital modulating signal generation device and generation method thereof |
| RU172898U1 (en) * | 2017-02-27 | 2017-07-31 | Акционерное общество "Концерн "Созвездие" | PARALLEL RADIO MODEM |
| CN111711586A (en) * | 2020-06-15 | 2020-09-25 | 吉林大学 | Time-frequency collaborative filtering method and system applied to communication modulation mode identification |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1405987A (en) * | 2001-08-07 | 2003-03-26 | 许继集团有限公司 | Single-double-path modulation and demodulation method, and singl-double-path modem thereof |
| WO2004091159A1 (en) * | 2003-04-08 | 2004-10-21 | Acn Advanced Communications Networks Sa | Method and apparatus for channel equalization in multi-carrier communication devices using discrete cosine modulated filter bank or wavelet packet modulation |
| CN101340207A (en) * | 2008-08-07 | 2009-01-07 | 清华大学 | Ultra-wideband receiving method based on sub-band parallel sampling |
-
2011
- 2011-04-14 CN CN201110093188.5A patent/CN102196111B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1405987A (en) * | 2001-08-07 | 2003-03-26 | 许继集团有限公司 | Single-double-path modulation and demodulation method, and singl-double-path modem thereof |
| WO2004091159A1 (en) * | 2003-04-08 | 2004-10-21 | Acn Advanced Communications Networks Sa | Method and apparatus for channel equalization in multi-carrier communication devices using discrete cosine modulated filter bank or wavelet packet modulation |
| CN101340207A (en) * | 2008-08-07 | 2009-01-07 | 清华大学 | Ultra-wideband receiving method based on sub-band parallel sampling |
Non-Patent Citations (3)
| Title |
|---|
| 何纬: "短波通信中的调制解调技术", 《西安电子科技大学》 * |
| 傅瑞锦: "短波多路并行调制解调器系统设计", 《西北工业大学硕士论文》 * |
| 韩艳刚: "短波数据传输系统关键技术研究", 《西安电子科技大学硕士论文》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105471801A (en) * | 2015-12-02 | 2016-04-06 | 中国电子科技集团公司第四十一研究所 | 5G mobile communication digital modulating signal generation device and generation method thereof |
| CN105471801B (en) * | 2015-12-02 | 2018-11-20 | 中国电子科技集团公司第四十一研究所 | A kind of 5G mobile communication digital modulation signal occurrence device and its method for generation |
| RU172898U1 (en) * | 2017-02-27 | 2017-07-31 | Акционерное общество "Концерн "Созвездие" | PARALLEL RADIO MODEM |
| CN111711586A (en) * | 2020-06-15 | 2020-09-25 | 吉林大学 | Time-frequency collaborative filtering method and system applied to communication modulation mode identification |
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| CN102196111B (en) | 2014-05-07 |
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